Final answer:
The goal of the Ming emperors in creating their capital cities was to show off their imperial power and glory.
Step-by-step explanation:
The primary goal of the Ming emperors in creating their capital cities, such as Beijing, was A. To show off their imperial power and glory. They wanted to convey an image of China's power, wealth, and magnificence through the construction of elaborate palaces, temples, and gardens within the capital city.